U.S. upgrades long-range bombs for Ukraine, resumes shipments

The U.S. is set to resume shipments of Ground-Launched Small Diameter Bombs (GLSDB) to Ukraine after upgrading them to counter Russian jamming, sources told Reuters.

The U.S. is preparing to deliver GLSDB munitions to Ukraine after reports suggested Kyiv’s supply of similar-range Army Tactical Missile Systems (ATACMS) had run low. The glide-bombs, originally purchased under former President Joe Biden’s administration, were modified to improve resilience against Russian electronic warfare, according to two sources familiar with the weapon.

President Donald Trump’s administration recently agreed to restore military aid and intelligence sharing with Ukraine, following Kyiv’s support for a proposed 30-day ceasefire with Russia. The reintroduction of GLSDBs could take place in the coming days, with stockpiles already in Europe.

The GLSDB, developed by Boeing and SAAB AB, combines a GBU-39 Small Diameter Bomb with an M26 rocket motor, extending its range to 100 miles (161 km). Ukraine has been seeking longer-range weapons to target Russian supply lines and troop positions.

However, Russian jamming previously interfered with the weapon’s guidance system, limiting its effectiveness. Recent tests, including 19 GLSDB firings, aimed to reinforce internal connections and enhance its resistance to electronic disruption, sources said.

Boeing declined to comment.

The U.S. has allocated nearly $33.2 billion in direct military purchases for Ukraine under the Ukraine Security Assistance Initiative, providing various arms and equipment to bolster Kyiv’s defense efforts.

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